Reversing-gear for engines



(No Model.) 2 Sheets-Sheet 1.

. H. B. LARZELERE.'

REVERSING GEAR FOR ENGINES. No. 331,069. Patented Nov. 24, 1885..

TERS. Pholwlithogrnpher. Wahinghm. n. c.

'(No Model.)

H. B.. LARZ-ELERE.

REVERSING GEAR FOR ENGINES.

Patented Nov. '24, 1885.

N, PETERS Pnm irnn STATES HENRY B. LARZELERE, OF GREENGASTLE, PENNSYLVANIA.

REVERSlNG-GEAR FOR ENGINES.

SPECIFICATION forming part of Letters Patent No. 331,069, dated November 24, 1885.

Application filed August 14, 1885. Serial No. 174,369.

To all whom it may concern.-

Be it known that I, HENRY B. LARZELERE, a citizen of the United States, residing in Greencastle, Franklin county, Pennsylvania, have invented certain Improvements in Reversing- Gear for Engines, of which the following is a specification.

My invention relates to that class of reversegear in which the valve-operating eccentric is adjustablein respect to the axis of the shaft from which it derives its rotating movement, the object of my invention being to provide simple means for readily shifting the eccentric when it is desired to reverse the engine.

In the accompanying drawings, Figure 1 is a plan View, partly in section, of sufficient of the engine to illustrate the application of my improved reverse-gear thereto; Figs. 2 and 3, end views, partly in section, of my improved reverse-gear in different positions; Figs. 4 and 5, longitudinal sections, partly in elevation, of the reverse-gear in different positions; and Figs. 6 and 7, detached perspective views of parts of the gearing.

In Fig. 1, A represents part of the frame of the engine, having bearings for the crankshaft B and for the valve-rod D, the latter being connected by a rod, a, to the strap 1) of an eccentric, F, which has a pin, d, adapted to an opening, f, in a pulley, G, secured to and rotating with the crank-shaft B, said pulley also having a segmental slot, for the recep tion of 2. lug, h, on the eccentric, so that while said eccentric is compelled to rotate with the pulley it can have a movement within certain limits independent of said pulley, the pin d serving as the fulcrum on which the eccentric swings in making this independent movement. The eccentric F has an elongated opening, at, for the reception of the shaft B and the hub of the pulley G, the front portion, t, of this opening being enlarged for the reception of a small eccentric, J, which bears at opposite points, m m, on the eccentric F, and is free to turn on the crankshaft, being confined laterally thereto by a transverse pin, a. (See Figs.

4. and. 5.) The outer end of the crank-shaft.

is twisted so as to form a screw-thread, K, to which is adapted a nut, 7c, carried by a sleeve,

(N0 model.)

M, a flange, p, on said sleeve being embraced by the forked end of an arm, 8, on a rod, 1?, which is guided in suitable hearings on the frame of the engine, and is under control of areverse-lever, S. Secured to and projecting from the eccentric J is a bar, t, rectangular in cross-section, and adapted to an opening, to, in the sleeve M, through which opening the bar can slide freely. In the ordinary run ning of the engine the eccentric J rotates with the shaft B and eccentric F, and the sleeve M occupies a position either at the outer or the inner end of the screw K; but when it is desired to reverse the engine the sleeve is moved longitudinally on the portion K of the shaft B, whereby a movement of partial rotation independent of the shaft is imparted to said sleeve; and this movement is transmitted through the medium of the bar t-to the eccentric J, a partial turn on the shaft B being thus imparted to said eccentric, so as to cause the eccentric F to swing on the ful crum-pin d from the position shown in Fig. 1 to that shown in Fig. 2, or vice versa, this shifting of the eccentric effecting such a movement of the valve-rod and valve as will cause a reversal in the direction of the movement of the engine.

The device described forms a compact and simple reverse-gear, the pulley G being the usual pulley for the reception of the governorbelt of the engine, although, if desired, the pulley for this purpose may be independent of the reverse-gear, and the carrier for the eccentric may consist of an arm or disk on the shaftinstead of the pulley, as shown.

I claim as my invention 1. The combination of the shaft B, the cocentric F, hung to a carrier on said shaft, and having a lug adapted to a slot in said carrier, and the eccentric J, hung to the shaft B, and adapted to a recess in the eccentric F, as specified.

2. The combination of the shaft B, having a threaded or twisted portion, K, the valveoperating eccentric F, hung to a carrier on said shaft, the eccentric J, hung to the shaft, adapted to a recess in the eccentric F, and having a projecting bar, 75, and the longitudinal ly-adjustable sleeve M, havinga nut adapt- In testimony whereof I have signed- Iny IO ed to said threadedportion 0fv theshaft, and I nametmthis specification ,in the presence of a recess. w, for the reception of the bar t, as two subscribing witnesses.

specified. 5 3. The combination of the shaft 13, the pul- HENRY B. LARZELERE. ley G, secured thereto, the valve-operating eccentric F, hung to said pulley, and the eccenj Witnesses:

tric J, hung t0 the shaft, and adapted to a rel WM. E. OANTNER, cess in said eccentric F, as specified.

S. B. GERHARDT. 

